Numerous diagnostic studies have been conducted on large-scale assessments to illustrate the students' mastery profile in the areas of math and reading; however, for science a limited number of investigations are reported. This study investigated Iranian eighth graders' competency mastery of science and examined the utility of the General…

In this paper, we examine how students discuss and interpret data and whether these actions vary depending on the type of data they analyse. More specifically, we are interested in whether students perform differently when analysing first-hand data, which they collect themselves, compared with second-hand data provided to them. Our data analysis…

Findings from this study of how two pairs of eighth-grade students each transacted with a website during think-aloud sessions at the conclusion of a curricular unit on Mexico and migration highlight the ways the students engaged in three interrelated tasks: (1) Identifying and making sense of "new" information; (2) Evaluating claims and evidence;…